2266 20160701171702.0 ASTROimport-423 Vamvatira-Nakou, C. 2011 Herschel-PACS observations of Nebulae Ejected by Massive Stars The study of the nebulae ejected from Luminous Blue Variables and the circumstellar bubbles around Wolf-Rayet stars, which radiate strongly in the infrared due to the heating of dust, is crucial for the understanding of the massive stars evolution. With Herschel we are able to observe these objects in the far-infrared region. In the context of the Mass-loss from Evolved StarS guaranteed time key program, we obtained imaging and spectroscopic observations of nebulae associated with Luminous Blue Variable and Wolf-Rayet stars using PACS, one of the three instruments on-board Herschel. A description of these observations, data analysis and preliminary results are presented. Royer, P. Hutsemékers, D. Rauw, G. Nazé, Y. Exter, K. Waelkens, C. Groenewegen, M. Bulletin de la Societe Royale des Sciences de Liege 80 2011 435-439 http://esoads.eso.org/abs/2011BSRSL..80..435V published in REFERD